Ship&#39;s stern frame



March 19,1929.l w. WINGA'E SHIP S STERN FRAME Filed Sept. 9, 1927 5Sheets-Sheet M1111'ch 19, 1929. w. wlNGArE 1,706,093

SHIPS STERN FRAME Filed sept'. 9, 1927 s sneewsnnt 2 19, 1929. w wlNGATE1,706,093

SHIP s STERN FRAME Filed sept. 9, 192'? 5 sheets-sheet 3 H3534. 5 .I 62l?? I Marh 19, 1929. w. wlNsA'rE SHIP'S STERN FRAME Filed Sept. 9. 19275 Sheets-Sheet 4 R www@ zy' aa/70 /L dw' M arch 19,1929. w, wlNGATE1,706,U93

sHIP's STERN FRAME Filed sept. 9, 1927 5 sheets-sheet 5 Patented Mar.19, 1929.

S'TATIES PATENT OFFICE.

WILLIAlrI WINGATE, OF BARROW-IN-FURNESS, ENGLAND.

SHIP S STERN FRAME.

` Application led September 9, 1927, Serial No. 218,467, and in GreatBritain November 1.7, 1926.

. rIhis invention relates to the manufacture present, by casting orforging.

Accordin to he present invention, a ships stern-traine is a ceinpoundstructure, being wholly or partially builtoitl iron or steel mem;

bers or roller section secured together by riveting` and (or) welding.ln some cases the back post only may be built in this manner. Means isprovided whereby the compound stern-frame can be secured where necessaryto the shell plating of the ship.

The members may be iron or steel bars of angie section, channel section,or other section adapted to impartrigidity to the structure. in somecases iron or steel plates may be used and be arranged side by side andsecured together to form a laminated structure.`

T he gndgeons et the back post of the sternrame are preferably madeseparately and have extensions which embrace, or lit between or within,the bars or plates constitu-.ting the back post, the gudgeons beingsecured in place by riveting and (or) welding.

The propeller boss may likewise beV made separately and have extensionsadapted to be inserted between, or within, the bars or platesconstituting the propeller-post of the sterntraine and then riveted and(or) welded in place.

rIhe bars or plates forming the stern-frame may be made as continuousstructure, apart from cut-away portions to receive the propeller bossand (or) gudgeons, or, alternatively, the said bars or plates may bemade in sections, jointed together by riveting and (or) welding. rlheYjoints in the differentbars or plates may be made at different places.On the other hand, the stern-frame may be made so that, when desired,the back post may be a separate part and be capable of being shippedinto place and' unshipped without disturbing the remainder of the frameor its connection to the shell ot. the ship.

In lien of constructing the stern-frame wholly ot angle or like sectionbars as aforesaid. or wholly of plates arranged side by side, part otthe stern-trame may be made according to the one construction andanother part ina-y be made according to the other construction. ln thiscase, the plates, where necessary, are cut away so as to iit into thechannels of the angle or like section bars, and the interengaging partsare held together by rivets or otherwise.

lin some cases, the whole or part of the back post may be dispensedwith, the stern-frame being then provided with heavy gudgeons on the`sole-piece and on an upward extension ot' the arch ot the propeller postfor the purpose ot carrying the rudder.

in order that the invention may be fully understood, several embodimentsthereof are shown, by way oil example, in the accompanying drawing, inwhich F l is a side elevation of a preferred construction otstern-'trame built of angle-section bars;

Fig. 2 is a sectional plan taken on the line` 2-2 in Fig. l;

Fig.` 3 is an enlarged end view of the joint at the bo.toin of thestern-trame shown in F l;

Fig. 4' is a cross-sectional view (enlarged) taken on the line li-l(Fig. l) Figs. 5 and 6 are similar views on the line 5%5 and line 6 6(Fig. l) respectively;

Fig. 7 is an end view of the propeller-boss in Fig. looking in thedirection of the arrow in;

Fig. 8 is an enlarged sectional plan, taken on the line 8 8 (Fig. l);

Fig. 9 is a side elevation of a modified construction of stern-frame;

Fig. l() is a sectional plan taken on the line l0--l0 (Fig. 9)

Fig. ll is a cross-sectional view (enlarged) taken on the line ll-ll(Fig. 9);

Fig. l2 is an end view of the propeller boss (Fig. 9), looking in thedirection of the arrow y;

Fig. 13 illustrates different combinations ot angle bars and plates forastern-frarne according to the invention;

Fig. le illustrates further combinations of channel bars and plates;

Fig. 15 is an enlarged cross-section of the propeller post of astern-frame modiiied for caulking;

Figs. 16 and 17 are side and plan views of a device for strengtheningthe parts of the stern-frame Fig. 18 is a side elevation of astern-frame built of iron or steel plates;

Fig. 19 is a sectional plan taken on the line v 19-19 (Fig. 18)

Fig. 2O is an end view of the propeller boss shown in Fig. 18;

Fig. 21 is a side lelevation (partly broken away) of a modification ofthe stern-frame shown in Fig. 18; n

Fig. 22 is an end view of the joint at the bottom of the stern-frameshown in Fig. 21;

Fig. 23 is a sectional plan taken on the line 23-23 (Fig. 21)

, Fig. 24 is an enlarged cross section on the line 24-24 (Fig. 21)

Fig. 25 is a cross section of a modification of the construction shownin Fig. 24;

Fig. 26 is an end View of another propellerl .boss arrangement;

Fig. 27 is an enlarged cross section of the propeller-post of thestern-fran'ie shown in Fig. 18 or 21;v

Figs. 28 to 31 are side views of the constituent plates of the laminatedstern-frame g' Fig. 32 is an end view of part of the structure shown inFig. 28.

Fig. 33 is a side elevation of a constwc-l tion of stern-frame in whichthe 'back post is dispensed with; l

Fig. 34 is a cross sectional View (enlarged) taken on the line 34--34(Fig. and Fig. 35 is a similar view taken on the line 35-35 (Fig. 33).`

Referring to Figs. 1 to 8 ofthe drawings z- The sternframe shown has aback post built of two straight angle-section bars 25 and' 26, whoseoverlapping flanges are secured'together by rivets 27, as at Fig. 8.rlhe propeller-post comprises two angle-section bars 28 and 29 likewisesecured by rivets 27 (Fig. 7), which bars 28 and 29 are curved at thebottom so as to meet the bars 25 and 26 at right angles, and, at thetop, form the arch of the stern-frame, above which a verticalupwardextension is provided. To the sides of the bars 28 and 29, marginplates 30, 31 (Fig. 4.).are riveted for the purpose of securing thestern-frame to the shell plating of the ship. The sole-piece comprisestwo angle irons 32, 33 of which the vertical flanges are riveted to themargin plates 30, 31. and to the side flanges of the bars 28, 29, andthe horizontal flanges are secured to a rider plate 34, which, alongwith the said angle irons 32, 33 extends forwardly from the stern-frameand is riveted to the keel 35 of the ship. An additional angle iron 36is riveted to the rider plate 34 and to the bottom of keel 35 so as toimpart greater strength to thejoint.

As will be seen from Fig. 7, the angle-section bars 28 and 29 areexpanded outwards from each other and the thwartship flanges thereof arereduced in breadth about `the middle of the propeller post so that acircular socket is constituted, into which socket a spigot 37 is fitted,this spigot having a flange 38 adapted to bear against the adjacentflanges of the bars 28 and 29 and be riveted thereto.

1n the back post of the stern-frame the gudgeons 39 for the rudderpintles are secured, each gudgeon 39 having a substantially rectangularportion 40 adapted to lit into the channel between the angle sectionbars 25 and 26 and be held in place by rivets 41.

The back-post may be so arranged that it can be shipped and unshippedwithout disturbing the ren'iainder of the stern-frame. According to thisarrangen'ient, the margin plates 30, 31 adjacent to the top of the backpost are made of such breadth that they embrace the sides of the bars 25and 26 and also the sides of the bars 28 and By means of rivets 42, 42)the bars 25 and 28 are riveted to the margin plate 30, whilst similarrivets 42, 42b secure the bars 2G and 29 to the margin plate 3l. Forfurther security, the overlapping flanges o'f the angle section bars 25and 26, and the corresponding flanges of the j bars 28 and 29 may besecured together at the top of the back post by the same rivets, in-

stead of by separate sets of rivets as in the remainder of the back postand propeller post. The bottom of the back post is held in place byrivets 43 and 44 (Fig. 3) which are passed through the anglefirons 32,33 on the solepiece of the sterndrame and, besides penetrating the bars25, 26 and 28, 29, also pass through the margin plates 30, 31. An anglebracket 28a (Figl) is fitted into the corner between the bars 25, 26 and2,8, 29, and is secured thereto by riveting or welding. lt will thus beclear that to unship the back post only the rivets42a, 43 and 44 andthev said angle bracket 28a need be removed.

Referring now to the arrangement shown in Figs. 9 to 17 .In this case,instead of using two anglesection bars 25, 26 or 28, 29 with overlappingflanges as h-ereinbefore described, I may use two angle section bars 45,46 (Fig. 13) with their flanges abutting and connected together by aseparate strip 47, or a single channel sec@ tion bar 48 (Fig. 13) may beused. Alternatively, if greater strength is necessary, two or morechannel section bars 48 14) may be used, in which case the two bars maybe set lwith their channels facing towards or away from each other, orboth facing in the same direction. Vhere two or more channel sectionbars are employed, they may be held together by side strips 49, servingalso as margin plates aforesaid, or if the bars are back to back theycan be securedto each other, either with or without an intermediatedistance piece. nstead of using'a pair of channel section bars, singlebars ot H section orV box section can bex used.

In Figs. 9 to 12, lf havey shown a sternrame built ot' angle sectionbars 45 and 461 connected together-by a strip47 and provided at theAsides with margin plates 30 and 31. This frameA is made asa continuousstructure throughout except at the propeller boss, where the bars` and46' andi strip 4i are out away andthe margin plates 30, 31 are expandedoutwardsfrom each other to form a substantially circular socket. `Thepropeller boss v37a comprises aring portion formed with a pairotdiametrical-ly opposite`lugs--,these lugsbeing so shaped that, when thering portion ot the boss is fitted intoy the circular socket-of thepropeller post, thelugs 50 project upwardsand' downwards into thecha-n'unels` between the angle section bars 45 and 46, small shoulders 51 beingalso formed onA these lugs to'bear against the abut-tingy ends of thelsaid bars. rllhe2 boss 37.@ is secure-d in position by rivets-52 passedthrough the side flanges ofthe bars 45, 46 and the lugs 50 of. the boss.

The attachment of the gudgeons 39 tothe angle section` bars 45 andg 46'is ell'ectedy by rivets 41 in substantially the same manner as describedwith reference to Figs. 1 and 6.

The frame formedby the angle section bars 45, 46 is connected tol theikeel ofV the ship, firstly by a rider plate 53v (see-Fig. 111), to whichthe horizontal flanges of the bars 45, 46 are riveted, and, secondly.,by two. ang-le irons54, 55 whose vertical flanges are riveted] to themargin plates 30,- 31l and the' side flanges of the bars45, 46'.

In the modilication shown in Fig. 9 the abutting parts of thepropellerpost and back post are jointed by an angle bracket 56 throughwhich rivets 57 are passed into the connecting strip 47 and adjacentflanges of the bars 45 and 46.

To enable the` joints between the aforesaid bars or plates tol bereadily caulked, such joints are arranged' so that an upst'anding faceis provided, along theedge of which the caulking tool can be applied.Thus, inY Fig. 15, they angle section bars 28- and 29 of the stern-trameillustrated in Fig. 1 are shown adapted for caulking, the end of theLflange" 28a of the bar 28 terminating a short distance away from theinterior corner of the bar 29,

and likewise the end ofthe flangel 29a of the;

bar v29 terminating a short distanceV away from the corner of the bar28, whilst the marginplates 30, 31 for thesame purposeV are termi nateda short distance away from the corners of their respective angle bars 28and 29.

For strengthening purposes, anumber of transverse ribs s-uch as 58(Figs. 1*'6 and'17) may be applied to theebarsofthe-stern-framethroughout. The saidrib 58 is formed withV vertical flanges 59 4adaptedto be-secured tothe flanges of the bars 28 and 29-by rivets-6G. Al-

ternatively, the ribs 58 may be secured in place by Welding and theflanges 59`dispensed with;

Referring to the construction show-1r at Figs. 18 to 320i the drawingsThe stern-frameillustrated on these figures is built of comparativelythin steel plates cut to the required size andi shape, there being liveplatesin all (Fig. 27), the two outermost plates 6l, 65being thickerthan the three inner plates 62, 63 and 64. The outermost plat es 61 and65, are similar'and are-asshown-inside elevationv in Fig. 28, from whichit will be seen that each` ot the saidplates ismade up ot six sectionsconnected by scart joints indicated' at 66. The intermediate plate 62-(Fig. 29) consists of four sections connected by scarfy joints indicatedat 68, whilst the intermediate plate 64 31) consists of 'four sectionsconnected by scarf joints 69. The scart joints arelocated so that ajoint does not occur in all the plates at the same place. ln' the caseof the plates62 and (i4-,the scarf joint at the juncture ot the arch andback post eX- tension is reinforced by welding TO. It will be seen fromFigs. 29 to 31 that portions of the plates 62, 63andf 64 are cut away toaceom modate the propeller boss (see also Fig. 20).

Figs. 18 to21 illus-trate the plates 61 and 65arrangedisideby side andsecured together byA rivets 71 so as to form a laminat-cd sternframe,the rivetsl' 1 also serving to hold in place the margin plates 30- and61 (see also Fig. 27). The seamsbetween the plates may be closedbyelectric'or other welding operation. The sole piece of the laminatedframe is provided with twovstraps 7 2 i'or strengthenmg purposes.

A modification of the laminated stern frame above described is shown inFigs. 21 lo 23, the plates61to=65 in thismOdificatiOn being made.so-that the back post as a whole can be shipped: and unshipped without(listin-l ing theY remainder of the frame; As in the modificationdescribed with reference to-Fig. 1, the margin plates 3()v and 31 aremade o' greater breadth at the top of the stern-frame so -as to embracethe sides of both the back post and upwa-rd extension of thepropellerpost'. The back post and saidupward extension are secured tothe margin plat-es 30, 31 by elongated rivets 71. The lower end of theback post is adapted toit into the rear end ot the sole piece by makingthe alternate plates 61, 63 and 65inlthe sole piece overlap theintermediate plates62 and 64 inthe back post, and riveting theinterengaging parts together. Thus the back post can be-unshippedsimply' by removing the rivets connecting it to the margin plates- 30.31 and overlapping plates 61, 63, 65 of the sole piece. Y

As will be apparent from Figs. 24 and 25. the .gndgeonslfmay haveextensions which 'embrace the back postand are held in place byelongated rivets 71 or may have a .singler extension which fits betweenthe outer plates 6l and 65, the middle plate 63 and intermediate plates62 and 64 being cut away in Fig. 26, the outer plates 6l and 65 in thisY case not being carried round the boss, but being cut away a shortdistance beyond the ends of the plates 62, 63 and 64, and the boss beingshaped to correspond. As in the aforementioned modification, curvedplates 81 are provided betweenl the parts of the margin plates 30, 3l. v

, It will be apparent that, whilst the invention has been described withreference to a stern-frame having a propeller post and back postseparated by an aperture as for a single screw ship, it is equallyapplicable to the constitution of stern-frames of L-shape (generallytermed stern-posts) for twin, or quadruple, screw ships and paddleSteamers.

In this modilication, the stern-post may comprise a pair of anglesection bars formed into the desiredfL-shape, the bars being fittedtogether so as to form a compound channel bar, and being secured to eachother by rivets passed through their overlapping flanges. Margin platesfor the shell platying are secured to the side flanges of the bars andgudgeons are fitted thereto for the reception of the rudder pintles, insubstantially the same manner as hereinbefore described with refere'nceto the stern-frame shown in Figs. l and 8. Likewise, the stern- Vpostextends upward to the transom floor and is secured thereto by anglebrackets. The sole piece of the stern-post comprises angle irons whoseupright flanges are. riveted to the sidev iianges and margin plates ofthe compound bar and whose horizontal fianges carry a rider plate.Stern-posts may also be made of other angular, channel and like section,or may be made of laminated form, the plates in this case being cut tothe proper shape, then placed side by side, and riveted together.

Referring to Figs. 33 to 35 In this modification, the whole of the backpost is dispensed with, but the construction of the stern frame, inother respects, is similar to the construction described with referenceto Figs. l to 8. The sole-piece of the frame, however, is provided witha foot-step gudgeon 82, and the upward extension of the propeller postcarries a heavy gudgeon 83. As shown in the sectional plan (Fig. 34),the gudgeon 83 is formed with rearwardly projecting jaws 84 adapted toembrace the sides of the angle section bars 28 and 29. In

'order that these bars may provide a firmer support for the gudgeon 83,a distance piece 85 is inserted between the side flanges of the saidbars, and the gudgeon is held in place by rivets 86 which arepassedthrough the jaws 84, distance piece 85 and the side flanges of the bars28, 29. rIhe sectional end view shown in Fig. 35 Villustrates themounting of the footstep gudgeon 82. The lower portion of this gudgeonis extended downwards to constitute a saddle-piece comprising sideflanges 87, 88 connected by an end Harige 89 (Fig. By means of thissaddle piece, the gudgeon 82 is adapted to rest on the rearwardlyprojecting ends of the bars 32, 33 and 28, 29. rlhe said gudgeon issecured in this position by means of rivets 90, 91, which are madeslightly longer than the rivets 43, 44 serving to hold the bars 32, 33and 28, 29 together.

It `will be understood that the bearing surfaces provided in thegudgeons 82 .and 83 may be of any known design suitable for the purpose.

The elimination of the back post or part thereof results in a lighterstern-frame, without reducing disadvantagecusly the strength of theframe.

It is to be understood that within the term iron or steel members ofrolled section as herein used, I include all rolledv iron or steelmembers such as bars of angle, channel or annular section, or fiat.plates.

It is also to be understood that, in sternframes made in accordance withmy invention, the exterior of the propeller boss, besides being circularmay be of rhomboidal or other polygonal shape.

Further modications may be made in my invention, without. departing fromthe scope thereof, and the shape of the parts can be varied to suitdifferent sizes and types of ships.

I claim l. A ships` stern-frame comprising a back post; a propeller.post structure built of iron or steel members of rolled section; 'a soleplate built. of iron or steel members of rolled section; flange membersseparate from but overlapping the parts of said structure and sole plateadjacent to the ships shell plating; means connecting the overlappingAparts'of said flange members to said structure and sole plate; andmeans securing the members of said structure and of sole plate to oneanother. j Y

2. A ships stern-frame comprising a back post built of angle-sectionmembers; a propeller post structure built of angle-section members; asole plate built of angle section members; margin plates overlapping theparts of said structure and sole plate adjacent to the shipsshellplating; means connecting the overlapping parts of said marginplates to said structure and sole plate; and

lll)

mea-ns securing the members of said structure and sole plate to oneanother'.

3., A ships stern-frame comprising a back post; a. propeller poststructure built of iron or steel members of rolled section; a sole platebuilt of iron or steel members of rolled section; flange membersoverlapping` the sides of said structure, sole plate and back postadjacent to the ships shell plating;

rivets connecting` said flange members to said l0 structure, sole plateand back post; rivets Connecting the rolled section members of saidstructure and of said sole plate to one another; and means connectingsaid back post to said structure and sole plate detachably. 15

In testimony whereof I aiix my signature.

VILLIAM VINGATE.

